Panasonic Cs C9dkzw Cu 2c18dkh Cu 3c20dkh Repair Manual

8.4.5. Anti-Freezing Control
 • If the temperature of the indoor heat exchanger falls below 2°C continuously for 4 minutes or more, the compressor turns off.
The fan speed setting remains the same.
 • This phenomenon is to protect the indoor heat exchanger from freezing and to prevent higher volume of refrigerant in liquid form
returning to the compressor.
 • Compressor will restart again when the indoor heat exchanger temperature rises to 10°C (Recovery).
 • Restart control (Time DelaySafety...

 • Anti-Dew Formation is control by:
 • Increasing Air Flow Volume
 1. Lo fan speed
Lo fan speed is changed to Lo+ after 30 min to prevent dew formation.
 2. QLo fan speed
Dew formation may occurs at QLo cool, therefore QLocool is operated only 1 hr 30 min (1hr QLo, 30 min QLo + 80 rpm).
After that, it operates at QLo +160rpm (However Quiet LED remains on).
 • Narrowing
 1. Vertical Airflow Direction
During Anti-dew condensation prevention, Airflow Direction Auto-control angle change from 0° - 32° to 20°...

During Anti-dew condensation prevention, Airflow Direction Manual control angle change from 10°, 15°, 20°, 32° to 22°, 24°,
26°, 28°, 30°.
8.5. Indoor Fan Speed Control
 • Indoor Fan Speed can be set using remote control.
8.5.1. Fan Speed Rotation Chart
SpeedFan Speed (rpm)
CS-C9DKZW
SHi1250
Hi1160
Me920
HLo840
CLo750
Lo-750
SLo710
QHi1060
QMe820
QLo650
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CS-C9DKZW CU-2C18DKH / CS-C9DKZW CU-3C20DKH 

8.5.2. Automatic Fan Speed Control
 • When set to Auto Fan Speed, the fan speed is adjusted between maximum and minimum setting as shown in the table.
 − Fan speed rotates in the range of Hi and Me.
 − Deodorizing Control will be activated.
 • Auto Fan Speed during cooling operation:
 1. Indoor fan will rotate alternately between off and on as shown in below diagram.
 2. At the beginning of each compressor start operation,indoor fan will increase fan speed gradually for deodorizing purpose.
 3. For the...

 • When the vertical airflow direction is set to Auto using the
remote control, the louver swings up and down as shown in
the diagram.
 • When stop operation using the remote control, the
discharge vent is reset, and stop at the closing position.
 • During Cooling operation or Soft Dry operation, indoor fan
motor may stop to rotate at certain periods. At that
condition, the louver will stop swinging and rest at the upper
limit.
 • When the vertical airflow direction is set to Manual using the
remote...

8.8. Horizontal Airflow Direction Control
 • The horizontal airflow direction louvers can be adjusted manually by hand.
8.9. Powerful Operation
 • The Powerful operation is to achieve the setting temperature quickly.
 • When Powerful operation is set, the setting temperature will be automatically decreased 3°C internally against the present
setting temperature (Lower temperature limit: 16°C).
 • This operation automatically will be running under SHi Fan Speed (Cooling), Lo- Fan Speed (Soft Dry).
 •...

8.10. Quiet Operation
(For Cooling Operation or cooling region of Soft Dry Operation)
 • The Quiet operation is to provide quiet/cooling operation condition compare to normal operation.
 • Once the Quiet Mode is set at the remote control, the Quiet Mode LED illuminated. The sound level will reduce around 2 dB(A)
for Lo fan speed or 3 dB(A) for Hi/Me fan speed against the present operation sound level.
 • Dew formation become severe at Quiet Lo cool, therefore Quiet Lo coolis operated only 1hr 30 min(1hr...

8.11. Ionizer Operation
 • The Ionizer operation is to provide fresh air effect to user by producing minus ion in discharge air.
8.11.1. Operation Control
 1. Ionizer individual operation
 a. When air-conditioner unit is at “OFF” condition (standby) and ION operation button at the remote control is pressed, the
Ionizer operation will turn on. Only ION LED will illuminates. Power LED maintain off. (1→2)
 b. Ionizer individual operation can be turned off by pressing the ION button again. (2→1)
 c. Fan...

8.11.2. Error Detection Control
 • The error detection control is to inform user that erroroccurs at ionizer system and repairing job will be needed.
 • There are two types of error detection control:
a. When Ionizer is ON
 − If ionizer feedback = Lo for 24 times within 11hr 30min, ION LED blinks continuously.
b. When ionizer is OFF
 − If ionizer feedback = Hi,ION LED blinks continuously.
 • During ionizer at breakdown condition, if ionizer feedback voltage = Lo (become normal), ION LED will stop...

9 Operating Instructions
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CS-C9DKZW CU-2C18DKH / CS-C9DKZW CU-3C20DKH